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Computer Network and Internet

In general, the computer that we use or that we often see
in homes is a stand-alone computer, meaning no associated with other computers. Stand-alone Computer This is called a stand-alone computer.
Actually, the computers can be interconnected between one with another. The computers are interconnected called computer network (network). This network could include areas small, eg for one office only, the so-called local area network (LAN). There is also an extensive computer network, for example, includes one campus or one region, called the wide area network (WAN).
Usefulness of computer networks, among others:
  • Can exchange data or information directly,
  • Can utilize equipment that is installed on another computer,
  • It could do a job together.
Computer network that covers the whole world a very famous is the internet. Through the internet people all over the world can be mutually related, exchange data / information, play together and so forth.

If the computer we want to be connected with other computers, we
must install the network device, such as installing LAN Card and connecting the computer with a cable network. If computer we want to be connected to the internet, we can put modem and subscribe to the company's Internet connection provider Internet services (Internet Service Provider / ISP).
 
Figure 1-10. Display a web site on the internet